<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>没有任何操作的HTML</title>
  <style>
    html, body {
      margin: 0;
      padding: 0;
    }

    .container {
      width: 1920px;
      height: 2000px;
      background: blue;
      margin: 0 auto;
    }

  </style>
</head>
<body>
<div class="container"></div>
</body>
</html>